Zk Dex Keygen Python

zk-dex-keygen-python

Python-based BabyJubJub keypair generation for zk-DEx. Generates keypairs using the BabyJubJub curve and exports them in encrypted keystore JSON format. Address derivation uses Poseidon hash (circomlibjs-compatible), matching the on-chain circuit implementation.

Dependencies

• sapling_jubjub.py (BabyJubJub curve arithmetic, from baby_jubjub_ecc)
• zkdex_lib/ (shared library: Poseidon hash, Account, Note)
• cryptography Python package (for AES-256-GCM encryption)
• Python 3.x

Usage

python generate_keypair.py --password <password>
# or
python generate_keypair.py -p <password>

Output Format

{
  "address": "914e04dccf3cd308ad6d0848df14ea5752e2b298",
  "publicKey": {
    "x": "0x...",
    "y": "0x..."
  },
  "keystore": {
    "crypto": {
      "cipher": "aes-256-gcm",
      "ciphertext": "...",
      "cipherparams": { "iv": "..." },
      "kdf": "scrypt",
      "kdfparams": { "n": 16384, "r": 8, "p": 1, "dklen": 32, "salt": "..." },
      "mac": "..."
    },
    "version": 1
  },
  "exportedAt": 1770846855188
}

• address: truncate_to_160_bits(Poseidon(pk.x, pk.y)) — 40 hex chars, circomlibjs pubKeyToAddress 호환
• publicKey: BabyJubJub public key coordinates with 0x prefix (64 hex chars each)
• keystore: Private key encrypted with scrypt KDF + AES-256-GCM
• exportedAt: Millisecond timestamp

Structure

• generate_keypair.py: Main script — keypair generation, Poseidon address derivation, keystore export
• sapling_jubjub.py: BabyJubJub curve field and point arithmetic
• sapling_utils.py: Bit/byte conversion utilities

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